Podcast
Questions and Answers
In flat rolling analysis, what does the coefficient of friction depend on?
In flat rolling analysis, what does the coefficient of friction depend on?
- Rolling speed and work material
- Lubrication, work material, and working temperature (correct)
- Final velocity and roll speed
- Roll radius and lubrication
What is the formula to calculate the flow stress (σf) based on true strain (ε) in rolling?
What is the formula to calculate the flow stress (σf) based on true strain (ε) in rolling?
- σf = kεn
- σf = nε / (1 + k)
- σf = kεn / (1 + n) (correct)
- σf = k / (1 + nε)
What is a characteristic condition of hot rolling known as sticking?
What is a characteristic condition of hot rolling known as sticking?
- The final velocity increases significantly
- The rolls stop moving
- The hot work surface adheres to the rolls (correct)
- The deformation decreases
Where is the peak pressure typically located in flat rolling along the contact length?
Where is the peak pressure typically located in flat rolling along the contact length?
What is the term used to describe the sequence in impression-die forging that causes flash to form in the gap between die plates?
What is the term used to describe the sequence in impression-die forging that causes flash to form in the gap between die plates?
In flashless forging, what occurs just before the initial contact with the workpiece?
In flashless forging, what occurs just before the initial contact with the workpiece?
What is a key requirement for both conventional and precision forgings after the initial forging process?
What is a key requirement for both conventional and precision forgings after the initial forging process?
Which type of forging hammer operates based on gravity for the drop mechanism?
Which type of forging hammer operates based on gravity for the drop mechanism?
What is the purpose of upsetting in forging?
What is the purpose of upsetting in forging?
What is the main characteristic of swaging in forging?
What is the main characteristic of swaging in forging?
In radial forging, how do the dies and workpiece move?
In radial forging, how do the dies and workpiece move?
What is roll forging primarily used for?
What is roll forging primarily used for?
What is the purpose of annealing in the preparation steps for continuous drawing of wire?
What is the purpose of annealing in the preparation steps for continuous drawing of wire?
What defect in extruded products is characterized by a centerburst?
What defect in extruded products is characterized by a centerburst?
In wire and bar drawing, what is the purpose of prelubrication after cleaning?
In wire and bar drawing, what is the purpose of prelubrication after cleaning?
What type of extrusion involves a combination of forward and backward motion?
What type of extrusion involves a combination of forward and backward motion?
What is the formula to calculate the rolling force?
What is the formula to calculate the rolling force?
How is the torque required to drive each roll calculated?
How is the torque required to drive each roll calculated?
What is the power, in Watts, required for the rolling process?
What is the power, in Watts, required for the rolling process?
How can rolling force and power be reduced in the rolling process?
How can rolling force and power be reduced in the rolling process?
What is the primary purpose of using ring rolling in a manufacturing process?
What is the primary purpose of using ring rolling in a manufacturing process?
In open-die forging, what does 'barreling' typically refer to?
In open-die forging, what does 'barreling' typically refer to?
